function convertMilliseconds(ms:number) {  
    // 计算分钟  
    var minutes = Math.floor(ms / (60 * 1000));  
      
    // 计算剩余的秒数  
    var seconds = Math.floor((ms - minutes * 60 * 1000) / 1000);  
      
    return {  
        minutes: Number(minutes)>9?minutes:'0'+minutes,  
        seconds: Number(seconds)>9?seconds:'0'+seconds  
    };  
}  

export default convertMilliseconds